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If impulse I varies with time t as I(kgm/s)=20t^2-40t. The change in momentum is minimum at which time
Impulse = change in momentumTherefore,dI/dt = 40t – 40 = 0at t = 1 sec. the Impulse would be minimum.Hence,I = 20 – 40 = -20 Kgm/s.
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